Preparation
2-Amino-4-nitrophenol diazotization, with 3-Methyl-1-phenyl-1H-pyrazol-5(4H)-one coupling for product 1; 2-Amino-5-nitrophenol diazotization, with 3-Methyl-1-phenyl-1H-pyrazol-5(4H)-one coupling for product 2, then the product 1 (1 Moore) and product 2 (1 Moore) and chromium (1 Moore) complexing into 1:2 chrome complexing dye.
